For good or bad, tennis players' fortunes change as quickly as the direction of the swirling wind at the U.S. Open. Just ask major champions Jennifer Capriati, Roger Federer and Carlos Moya, who all dealt with shaky starts Monday before winning first-round matches. Or ask Mario Ancic and Karolina Sprem, who marked themselves as stars-to-be at Wimbledon but were one-and-done at the next Grand Slam.